Mechanical Properties of CFRP Materials with Ply Splice Structures

Abstract

With the development of science and technology, it is inevitable to apply ply splice to meet the requirements of engineering size and shape. The existence of splicing structure will inevitably produce complex stress distribution inside the material, which will lead to serious safety hazards. In this paper, tensile and bending properties of unidirectional carbon fiber reinforced plastic (CFRP) with ply splice structures were studied through tensile and four-point bending experiments. The results show that the higher the number of splicing layers, the lower the tensile strength, and the final strength is determined by the number of continuous fiber layers without splicing. However, there is almost no effects of the ply spliced structure on the four-point bending strength because of the loading features and the fracture mode.